题目内容
解方程.
75%X+24=57
X-
=
.
75%X+24=57
| 4 |
| 5 |
| 2 |
| 3 |
| 1 |
| 6 |
分析:(1)根据等式的性质,在方程两边同时减去24,再除以0.75求解.
(2)根据等式的性质,在方程两边同时加上
,再乘上
求解.
(2)根据等式的性质,在方程两边同时加上
| 2 |
| 3 |
| 5 |
| 4 |
解答:解:(1)75%X+24=57,
0.75X+24-24=57-24,
0.75X÷0.75=33÷0.75,
X=44;
(2)
X-
=
,
X-
+
=
+
,
X×
=
×
,
X=1
.
0.75X+24-24=57-24,
0.75X÷0.75=33÷0.75,
X=44;
(2)
| 4 |
| 5 |
| 2 |
| 3 |
| 1 |
| 6 |
| 4 |
| 5 |
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 6 |
| 2 |
| 3 |
| 4 |
| 5 |
| 5 |
| 4 |
| 5 |
| 6 |
| 5 |
| 4 |
X=1
| 1 |
| 24 |
点评:本题主要考查了学生根据等式的性质解方程的能力,注意等号对齐.
练习册系列答案
相关题目